Battery piece coating system

Abstract

The embodiment of the invention provides a battery piece coating system which comprises a conveying line used for conveying battery pieces and a plurality of coating modules arranged beside conveying stations of the conveying line, the conveying line is provided with a plurality of conveying stations, and the battery pieces are conveyed between the coating modules and the conveying stations. The plurality of coating modules comprise a first coating module comprising at least one first coating device; comprising at least one second coating device; comprising at least one second coating device; comprising at least one fourth coating device; wherein the number of at least one of the first coating devices, the second coating devices, the third coating devices and the fourth coating devices is not less than two. According to the battery piece coating system in the embodiment of the invention, the probability of occurrence of the situation that the conveying line needs to wait for treatment of a single coating device and is empty on the whole is reduced, and the number of battery pieces treated in unit time is increased.

Description

technical field [0001] The invention relates to the technical field of photovoltaic equipment, in particular to a cell film coating system. Background technique [0002] With the increasing demand of human beings for energy saving and emission reduction, photovoltaic power generation has broad industrial prospects on a global scale. Among them, silicon-based heterojunction solar cells, with their simple preparation process, high conversion efficiency and high potential for cost reduction and efficiency increase, have attracted more and more attention from the industry and have become a hot spot in the industry. [0003] PECVD (plasma enhanced chemical vapor deposition, plasma enhanced chemical vapor deposition) process is in a relatively high vacuum environment, using a high frequency power supply to ionize the reactive gas into a plasma state to complete the surface coating process, which is widely used in the field of photovoltaic cell manufacturing. [0004] Taking the s...

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Problems solved by technology

[0004] Taking the silicon-based heterojunction solar cell coating production line as an example, in related technologies, multiple PECVD process equipments are arranged in sequence on the production line, and intrinsic thin-film silicon layers are symmetrically deposited on the upper and lower surfaces of the crystalline silicon substrate by PECVD process equipment Then continue to utilize other PECVD process equipment to deposit N-type doped layer and P-type doped layer on the intrinsic thin-film silicon layer on the upper and lower surfaces, due to the intrinsic thin-film silicon layer, N-type doped layer, and P-type doped layer The coating time is different, and the production cycle of the production line is set according to the coating process with the longest duration, resulting in long waiting time for other processes and low production efficiency

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